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International Conference on computer Supported Cooperative Work in Design

作者： Vanessa Tavares Nunes Cláudia M. Lima Werner Flávia Maria Santoro COPPE/PESC-Systems Engineering and Computer Science Program UFRJ Rio de Janeiro Brazil NP2Tec and Postgraduate Information Systems Program UNIRIO Rio de Janeiro Brazil

Complexity and dynamism of day-to-day activities in organizations are inextricably linked, one impacting the other, increasing the challenges for constant adaptation on the way to organize work to address emerging demands. Market is demanding systems that are aware of organizations processes and able to evolve and adapt to new situations in everyday working activities. We argue that flexibility in processes could be managed in real time, by PAIS (Process-aware Information systems), using context information collected in the work environment. This paper proposes CGAdapt, a context management architecture approach that aims to improve and automate dynamic process adaptation. We explain how process adaptation may occur in real time through an existent scenario using this proposal and discuss the value of context-awareness to reason about process alternative adaptations in a goal oriented approach.

关键词： Context Materials Business Adaptation models Analytical models

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Awareness and Comprehension in Software/systems engineering Practice and Education: Trends and Research Directions

Awareness and Comprehension in Software/Systems Engineering ...

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Brazilian Symposium on Software engineering (SBES)

作者： Marcelo Schots Cl'udia Werner Manoel Mendonça Systems Engineering and Computing Program COPPE Federal University of Rio de Janeiro Rio de Janeiro Brazil Computer Science Department Federal University of Bahia Rio de Janeiro Brazil

The creation of tools, techniques and methodologies to support the manipulation of large data sets has been receiving special attention of both scientific and industrial communities, in order to discover new ways of dealing with the underlying information, including learning purposes, identification of patterns, decision making support, amongst others. However, making use of computing resources to enhance awareness and understanding of software information and the software itself is still a challenge in software/systems engineering, since it involves the identification of suitable mechanisms, adequate abstractions, and studies on stimulation of the human perceptive and cognitive abilities. This paper presents some of the challenges in this context, based on current trends of software development lifecycle, program comprehension, and software engineering education. At the end, a special focus is given on ongoing research on using and improving current mechanisms for supporting software reuse practices and software comprehension in general.

关键词： Software Software engineering Education Visualization Conferences Industries Data visualization

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Multiobjective optimization for project portfolio selection 12

Multiobjective optimization for project portfolio selection

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14th International Conference on Genetic and Evolutionary Computation Companion, GECCO'12 Companion

作者： De Barros, Márcio O. Costa, Hélio R. Figueiredo, Fábio V. Da Rocha, Ana Regina C. Post-graduate Information Systems Program - PPGI UNIRIO Av. Pasteur 458 Urca - Rio de Janeiro RJ Brazil COPPE UFRJ System Engineering and Computer Science Department Caixa Postal: 68511 CEP: 21945-970 - Rio de Janeiro Brazil CCA-RJ Brazilian Air Force Ponta do Galeão s/no Ilha do Governador CEP: 21941-510 - Rio de Janeiro Brazil

ISBN: (纸本)9781450311786

This paper proposes a multiobjective heuristic search approach to support a project portfolio selection technique on scenarios with a large number of candidate projects. The original formulation for the technique requires analyzing all combinations of candidate projects, which is unfeasible when more than a few alternatives are available. We have used a multiobjective genetic algorithm to partially explore the search space of project combinations and select the most effective ones. We present an experimental study based on four project selection problems that compares the results found by the genetic algorithm to those yielded by a non-systematic search procedure. Results show evidence that the project selection technique can be used in large-scale scenarios and that GA presents better results than simpler search strategy. Copyright is held by the author/owner(s).

关键词： Multiobjective optimization

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PatternLab: From mass spectra to label-free differential shotgun proteomics

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Current Protocols in Bioinformatics 2012年第SUPPL.40期40卷

作者： Carvalho, Paulo C. Fischer, Juliana S.G. Xu, Tao Yates III, John R. Barbosa, Valmir C. Carlos Chagas Institute-Fiocruz Parańa Brazil Department of Cell Biology The Scripps Research Institute La Jolla CA United States Systems Engineering and Computer Science Program COPPE Federal University of Rio de Janeiro Brazil

PatternLab for proteomics is a self-contained computational environment for analyzing shotgun proteomic data. Recent improvements incorporate modules to facilitate the computational analysis, such as FastaDBXtractor for sequence database preparation and ProLuCID runner for simplifying and managing the protein identification search engine;modules for pushing the limits on proteomics standards, such as SEPro, which relies on a semi-labeled decoy approach for increasing confidence in filtering and organizing peptide spectrum matches;and modules with novel features, such as SEProQ for enabling labelfree quantitation by extracted ion chromatograms according to a distributed normalized ion abundance factor approach (dNIAF). Existing modules were also improved, such as the TFold module for pinpointing differentially expressed proteins. These new modules are integrated into the previously described arsenal of tools for further data analysis. Here we provide detailed instructions for operating and understanding them. © 2012 by John Wiley & Sons, Inc.

关键词： Dniaf filtering PSMs Protein identification Quantitative proteomics Semi-labeled decoy approach

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Porantim-opt: Optimizing the combined selection of model-based testing techniques

Porantim-opt: Optimizing the combined selection of model-bas...

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Workshop on Requirements and Validation, Verification, and Testing

作者： Neto, Arilo Claudio Dias De Freitas Rodrigues, Rosiane Travassos, Guilherme Horta Post-graduation Program In Informatics Computer Science Department Federal University of Amazonas Manaus AM Brazil Systems Engineering and Computer Science Program COPPE Federal University of Rio De Janeiro Rio De Janeiro RJ Brazil

ISBN: (纸本)9780769543451

The combination of testing techniques is considered an effective strategy to evaluate a software product. However, the selection of which techniques to combine in a software project has been an interesting challenge in the Software engineering field. This paper presents a proposal extending an approach developed to support the combined selection of model-based testing (MBT) techniques, named Porantim, applying Multiobjective Combinatorial Optimization strategy by determining the smallest dominating set in a bipartite and weighted graph. Thus, a local search strategy algorithm is proposed generating solutions aiming at maximizing the coverage of software project characteristics and skills required by the testing team to use the techniques and minimizing the eventual effort to construct models used for test cases generation. A preliminary evaluation analyzes this new approach when compared to the Porantim's original version, and the results indicate improvements in the MBT techniques selection. © 2011 IEEE.

关键词： Software testing

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Dynamic process adaptation: A context-aware approach

Dynamic process adaptation: A context-aware approach

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International Conference on computer Supported Cooperative Work in Design

作者： Nunes, Vanessa Tavares Werner, Cláudia M. Lima Santoro, Flávia Maria COPPE/PESC - Systems Engineering and Computer Science Program - UFRJ PO Box 68511 21945-970 Rio de Janeiro Brazil NP2Tec and Postgraduate Information Systems Program UNIRIO Rio de Janeiro Brazil

ISBN: (纸本)9781457703874

Dynamism of day-to-day activities in organizations is inextricably linked and there is a variety of information, insight and reasoning being processed between people and systems, in carrying out a business process. We argue that flexibility in processes could be managed in real time, using context information collected in the work environment. This paper proposes a context management architecture approach that aims to improve and automate dynamic process adaptation. We explain how process adaptation may occur in real time and discuss a scenario for this proposal © 2011 IEEE.

关键词： Process design

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A parallel Ray Tracing architecture suitable for application-specific hardware and GPGPU implementations

A parallel Ray Tracing architecture suitable for application...

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2011 14th Euromicro Conference on Digital System Design: Architectures, Methods and Tools, DSD 2011

作者： Nery, Alexandre S. Nedjah, Nadia Franca, Felipe M.G. Jozwiak, Lech LAM - Computer Architecture and Microelectronics Laboratory Systems Engineering and Computer Science Program COPPE Universidade Federal Rio de Janeiro Brazil Department of Electronics Engineering and Telecommunications Faculty of Engineering Universidade do Estado Rio de Janeiro Brazil Department of Electrical Engineering - Electronic Systems Eindhoven University of Technology Netherlands

ISBN: (纸本)9780769544946

The Ray Tracing rendering algorithm can produce high-fidelity images of 3-D scenes, including shadow effects, as well as reflections and transparencies. This is currently done at a processing speed of at most 30 frames per second. Therefore, actual implementations of the algorithm are not yet suitable for interactive real-time rendering, which is required in games and virtual reality based applications. Fortunately, the algorithm allows for massive parallelization of its computations. In this paper, we present a parallel architecture for ray tracing based on a uniform spatial subdivision of the scene and exploiting an embedded computation of ray-triangle intersections. This approach allows for a significant acceleration of intersection computations, as well as, a reduction of the total number of the required intersections checks. Furthermore, it allows for these checks to be performed in parallel and in advance for each ray. In this paper we discuss and analyze an ASIP-based implementation using FPGAs and a GPGPU-based parallel implementation of the proposed architecture. The performance of both implementations are reported and compared." © 2011 IEEE.

关键词： Ray tracing

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Hardware reuse in modern application-specific processors and accelerators

Hardware reuse in modern application-specific processors and...

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2011 14th Euromicro Conference on Digital System Design: Architectures, Methods and Tools, DSD 2011

作者： Nery, Alexandre S. Jozwiak, Lech Lindwer, Menno Cocco, Mauro Nedjah, Nadia França, Felipe M.G. LAM - Computer Architecture and Microelectronics Laboratory Systems Engineering and Computer Science Program COPPE Universidade Federal do Rio de Janeiro Brazil Department of Electronics Engineering and Telecommunications Faculty of Engineering Universidade do Estado do Rio de Janeiro Brazil Department of Electrical Engineering - Electronic Systems Eindhoven University of Technology Netherlands Silicon Hive - Intel UMG Netherlands

ISBN: (纸本)9780769544946

Effective exploitation of the application-specific parallel patterns and computation operations through their direct implementation in hardware is the base for construction of high-quality application-specific (re-) configurable application specific instruction set processors (ASIPs) and hardware accelerators for modern highly-demanding applications. Although it receives a lot of attention from the researchers and practitioners, a very important problem of hardware reuse in ASIP and accelerator synthesis is clearly underestimated and does not get enough attention in the published research. This paper is an effect of an industry and academic collaborative research. It analyses the problem of hardware sharing, shows its high practical relevance, as well as a big influence of hardware sharing on the major circuit and system parameters, and its importance for the multi-objective optimization and tradeoff exploitation. It also demonstrates that the state-of-the-art synthesis tools do not sufficiently address this problem and gives several guidelines related to enhancement of the hardware reuse. © 2011 IEEE.

关键词： Multiobjective optimization

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A tool for analysing logics

A tool for analysing logics

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作者： Veloso, Sheila R.M. Veloso, Paulo A.S. Veloso, Paula M. Systems and Computer Engin. Dept. Fac. of Engineering UERJ: State University of Rio de Janeiro Rio de Janeiro RJ Brazil Systems and Computer Engineering Program COPPE UFRJ: Federal University of Rio de Janeiro Rio de Janeiro RJ Brazil Mathematics Dept. ICEx UFMG: Federal University of Minas Gerais Belo Horizonte MG Brazil

We introduce and examine a tool for analysing logics. This algebraic tool, coming from some ideas introduced by J. Piaget, provides condensed information about a logic (with emphasis on the behavior of a unary symbol), as such, it can be employed for analysing and, to some extent, comparing logics. © 2011 Elsevier B.V. All rights reserved.

关键词： computer circuits

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Common Agile Practices in Software Processes

Common Agile Practices in Software Processes

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International Symposium on Empirical Software engineering and Measurement, ESEM

作者： Jose Fortuna Abrantes Guilherme Horta Travassos COPPE/Systems Engineering and Computer Science Program Federal University of Rio de Janeiro Rio de Janeiro Brazil

Objective: to investigate studies about software processes looking for practices which can be used to obtain agility in software processes. Method: A systematic review including seven search engines was executed in Feb/2010. To apply the defined criteria to select papers and extract information regarding working practices bringing agility to software processes. Results: from 6696 retrieved papers, 441 were selected to support the identification of 236 occurrences of 51 distinct practices associated with the concept of agility. Their descriptions were deeply analyzed and consolidated. After discarding those which appeared in the technical literature in a small amount of papers, 17 agile practices were identified. Conclusion: although further studies are necessary to evaluate the efficacy of these 17 agile practices, 12 of them have been more commonly approached in the software projects and could be primarily considered: test driven development, continuous integration, pair programming, planning game, onsite customer, collective code ownership, small releases, metaphor, refactoring, sustainable pace, simple design and coding standards.

关键词： Software Software engineering Context programming profession Business Encoding

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